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Re: BBC MicroBit has arrived - which Forth in Python is recommended for now?

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.lang.forth
Subject Re: BBC MicroBit has arrived - which Forth in Python is recommended for now?
Date 2016-04-25 21:36 -0700
Organization A noiseless patient Spider
Message-ID <87potdj89g.fsf@nightsong.com> (permalink)
References (9 earlier) <d_qdnVnUrr2Cf4XKnZ2dnUU7-KvNnZ2d@supernews.com> <2016Apr24.174508@mips.complang.tuwien.ac.at> <Ka6dnfbt-t8iTIDKnZ2dnUU7-K_NnZ2d@supernews.com> <87twipjscc.fsf@nightsong.com> <Fd2dnQ-KbvWgLIPKnZ2dnUU7-SXNnZ2d@supernews.com>

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"Elizabeth D. Rather" <erather@forth.com> writes:
> It really depends on how you think about what a "task" is. If you
> think of a task as a "person" with a set of responsibilities (e.g.,
> accepting data from a device, processing it, and recording it) then
> you look at how that port is being used.

One person accepting data, one sending data, and one recording it,
maybe.

> I can't think offhand of a case in which a full-duplex port literally
> has concurrent streams of data flowing in and out.

That's the *definition* of a full-duplex port! ;-)

> Examples that come to mind are a port that may be doing continuous
> output until an input signals that it should stop, or one that is
> receiving data and sends a signal to stop when it has enough. 

Think of a phone conversation where both people can talk at the same
time, or a rendezvous where two people each hand a suitcase full of
data to the other (simultaneous file transfers in both directions).

> To actually set up two tasks, even though these tasks are pretty
> lightweight, adds the necessity for them to communicate in ways that
> complicate the process considerably.

Shrug, I think it's more complicated to figure out how to juggle the
necessary stuff in one task.  Doing it with 2 tasks is simple and
general and I've done it that way tons of times.  I hear all kinds of
dire stories about locking and synchronization errors but none of that
has ever happened to me.  The main simplifying principles are 1)
communicate between tasks only through mailboxes (never through shared
memory) and 2) any piece of mutable data should be owned by exactly one
task and only accessed (whether reading or writing) by that task.  If
any other task something done with the data it can query the owning task
through a mailbox.

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BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 00:14 -0700
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-04-06 00:18 -0700
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Martin Nicholas <reply-2016@mgn.org.uk> - 2016-04-06 10:13 +0100
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 02:32 -0700
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Julian Fondren <julian.fondren@gmail.com> - 2016-04-06 03:25 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 05:07 -0700
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Mark Wills <markwills1970@gmail.com> - 2016-04-06 06:10 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-04-06 07:26 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Julian Fondren <julian.fondren@gmail.com> - 2016-04-06 07:38 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 08:08 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-04-06 08:18 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? lawrencedo99@gmail.com - 2016-06-15 21:34 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-06-16 00:43 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Julian Fondren <julian.fondren@gmail.com> - 2016-06-19 03:54 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 07:55 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-04-06 08:13 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 10:17 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-04-07 00:17 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Mark Wills <markwills1970@gmail.com> - 2016-04-07 01:27 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Albert van der Horst <albert@spenarnc.xs4all.nl> - 2016-04-07 09:29 +0000
              Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-07 03:27 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-04-07 12:11 -0400
              Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Gerard Sontag <gerardsontag@gmail.com> - 2016-04-07 05:39 -0700
              Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-04-07 11:45 -0400
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-04-09 00:37 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-04-06 14:47 -0400
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-04-06 03:10 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 03:32 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Albert van der Horst <albert@spenarnc.xs4all.nl> - 2016-04-06 10:48 +0000
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 04:22 -0700
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 08:32 -0700
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-06 11:44 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-06 12:43 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-04-07 03:31 -0400
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-07 00:40 -0700
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? visualforth@rocketmail.com - 2016-04-06 18:16 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-18 09:49 -0700
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Mark Wills <markwills1970@gmail.com> - 2016-04-18 13:20 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-19 04:04 -0500
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Ron Aaron <rambamist@gmail.com> - 2016-04-19 12:11 +0300
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-19 05:15 -0500
              Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Ron Aaron <rambamist@gmail.com> - 2016-04-19 13:31 +0300
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-04-19 02:12 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-04-19 11:48 -0400
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-20 04:07 -0500
              Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? minforth@arcor.de - 2016-04-20 04:35 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Bernd Paysan <bernd.paysan@gmx.de> - 2016-04-20 21:11 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? minforth@arcor.de - 2016-04-21 05:31 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-21 09:22 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-04-24 15:45 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-24 11:23 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? lawrencedo99@gmail.com - 2016-06-15 21:29 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? "Elizabeth D. Rather" <erather@forth.com> - 2016-04-24 09:40 -1000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-04-24 20:18 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? "Elizabeth D. Rather" <erather@forth.com> - 2016-04-24 14:56 -1000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-25 03:13 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-25 14:23 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? "Elizabeth D. Rather" <erather@forth.com> - 2016-04-25 14:07 -1000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-25 21:36 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-04-26 11:32 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? "Elizabeth D. Rather" <erather@forth.com> - 2016-04-26 08:39 -1000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-04-26 19:20 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? "Elizabeth D. Rather" <erather@forth.com> - 2016-04-26 13:09 -1000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Albert van der Horst <albert@cherry.spenarnc.xs4all.nl> - 2016-04-27 17:55 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-04-27 01:54 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-26 02:47 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-26 01:12 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-26 04:04 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-26 02:53 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-26 08:23 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-27 17:49 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-28 03:47 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Albert van der Horst <albert@cherry.spenarnc.xs4all.nl> - 2016-04-28 11:50 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-04-29 00:11 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Albert van der Horst <albert@cherry.spenarnc.xs4all.nl> - 2016-04-26 11:26 +0000
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? foxaudioresearch@gmail.com - 2016-04-26 07:04 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2016-04-26 09:29 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-26 10:47 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? visualforth@rocketmail.com - 2016-04-20 16:04 -0700
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-04-19 10:47 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-04-21 11:54 -0700
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? kiy <kiyoneda@gmail.com> - 2016-05-15 17:20 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Bernd Paysan <bernd.paysan@gmx.de> - 2016-06-04 22:01 +0000
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-06-05 08:53 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-06-05 08:55 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? visualforth@rocketmail.com - 2016-06-06 19:47 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Jan Coombs <jenfhaomndgfwutc@murmic.plus.com> - 2016-06-07 10:07 +0100
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? endlessboomcapitalism@gmail.com - 2016-06-07 08:43 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-06-19 01:20 -0700
  Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-06 04:13 -0700
    Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-06 13:32 -0400
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Cecil Bayona <cbayona@cbayona.com> - 2016-08-06 14:27 -0500
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-07 03:46 -0700
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-07 12:31 -0400
      Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-07 03:39 -0700
        Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-07 12:30 -0400
          Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-09 08:20 -0700
            Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-09 13:52 -0400
              Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-11 03:41 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-11 17:56 -0400
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-11 22:50 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Paul Rubin <no.email@nospam.invalid> - 2016-08-11 23:13 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? Cecil Bayona <cbayona@cbayona.com> - 2016-08-12 03:43 -0500
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? hughaguilar96@gmail.com - 2016-08-11 23:29 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-12 02:48 -0400
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? JUERGEN <epldfpga@aol.com> - 2016-08-12 05:17 -0700
                Re: BBC MicroBit has arrived - which Forth in Python is recommended for now? rickman <gnuarm@gmail.com> - 2016-08-12 11:11 -0400

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